Duellman William Edward

Descriptions Of Two Species Of Frogs, Genus Ptychohyla / Studies Of American Hylid Frogs, V

A Review Of The Frogs Of The Hyla Bistincta Group

A Review Of The Frogs Of The Hyla Bistincta Group

A Review Of The Middle American Tree Frogs Of The Genus Ptychohyla

The Amphibians And Reptiles Of Michoacán, México

Type Specimens Of Amphibians And Reptiles In The Museum Of Natural History, The University Of Kansas

A Distributional Study Of The Amphibians Of The Isthmus Of Tehuantepec, México

The Hylid Frogs Of Middle America: 2